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BF537 memset causing core faults

Question asked by ali on Oct 18, 2010
Latest reply on Oct 19, 2010 by CraigG

Hi,

I am trying to load u-boot on newly stuffed blackfin bf537.

I am using UrJtag with Wiggler for the purpose.

 

after initialization of stack and loading u-boot through JTAg, if I just run (Continue) the gdb i get the u-boot prompt on my serial program. But if i choose to do "memset" on specific regions of _bss_start and _bss_end depending on the system map for that particular u-boot i instantly get the following msgs. then i have to reset teh whole thing.

What causes this behaviour  ?

info:      bfin: [0] a double fault has occured EMUPC [0xEF000000]
error:     bfin: [0] CORE FAULT core cannot read register [14]
error:     bfin: [0] CORE FAULT core cannot read register [0]
error:     bfin: [0] CORE FAULT core cannot read register [1]
error:     bfin: [0] CORE FAULT core cannot read register [2]
error:     bfin: [0] CORE FAULT core cannot read register [3]
error:     bfin: [0] CORE FAULT core cannot read register [4]
error:     bfin: [0] CORE FAULT core cannot read register [5]
error:     bfin: [0] CORE FAULT core cannot read register [6]
error:     bfin: [0] CORE FAULT core cannot read register [7]
error:     bfin: [0] CORE FAULT core cannot read register [8]
error:     bfin: [0] CORE FAULT core cannot read register [9]
error:     bfin: [0] CORE FAULT core cannot read register [10]
error:     bfin: [0] CORE FAULT core cannot read register [11]
error:     bfin: [0] CORE FAULT core cannot read register [12]
error:     bfin: [0] CORE FAULT core cannot read register [13]
error:     bfin: [0] CORE FAULT core cannot read register [15]
error:     bfin: [0] CORE FAULT core cannot read register [16]
error:     bfin: [0] CORE FAULT core cannot read register [17]
error:     bfin: [0] CORE FAULT core cannot read register [18]
error:     bfin: [0] CORE FAULT core cannot read register [19]
error:     bfin: [0] CORE FAULT core cannot read register [20]
error:     bfin: [0] CORE FAULT core cannot read register [21]
error:     bfin: [0] CORE FAULT core cannot read register [22]
error:     bfin: [0] CORE FAULT core cannot read register [23]
error:     bfin: [0] CORE FAULT core cannot read register [24]
error:     bfin: [0] CORE FAULT core cannot read register [25]
error:     bfin: [0] CORE FAULT core cannot read register [26]
error:     bfin: [0] CORE FAULT core cannot read register [27]
error:     bfin: [0] CORE FAULT core cannot read register [28]
error:     bfin: [0] CORE FAULT core cannot read register [29]
error:     bfin: [0] CORE FAULT core cannot read register [30]
error:     bfin: [0] CORE FAULT core cannot read register [31]
error:     bfin: [0] CORE FAULT core cannot read register [32]
error:     bfin: [0] CORE FAULT core cannot read register [33]
error:     bfin: [0] CORE FAULT core cannot read register [34]
error:     bfin: [0] CORE FAULT core cannot read register [35]
error:     bfin: [0] CORE FAULT core cannot read register [36]
error:     bfin: [0] CORE FAULT core cannot read register [37]
error:     bfin: [0] CORE FAULT core cannot read register [38]
error:     bfin: [0] CORE FAULT core cannot read register [39]
error:     bfin: [0] CORE FAULT core cannot read register [40]
error:     bfin: [0] CORE FAULT core cannot read register [41]
error:     bfin: [0] CORE FAULT core cannot read register [42]
error:     bfin: [0] CORE FAULT core cannot read register [43]
error:     bfin: [0] CORE FAULT core cannot read register [44]
error:     bfin: [0] CORE FAULT core cannot read register [45]
error:     bfin: [0] CORE FAULT core cannot read register [46]
error:     bfin: [0] CORE FAULT core cannot read register [47]
error:     bfin: [0] CORE FAULT core cannot read register [48]
error:     bfin: [0] CORE FAULT core cannot read register [49]
error:     bfin: [0] CORE FAULT core cannot read register [50]
error:     bfin: [0] CORE FAULT core cannot read register [51]
error:     bfin: [0] CORE FAULT core cannot read register [52]
error:     bfin: [0] CORE FAULT core cannot read register [54]
error:     bfin: [0] CORE FAULT core cannot read register [55]
error:     bfin: [0] CORE FAULT core cannot read register [56]
error:     bfin: [0] CORE FAULT core cannot read register [57]
error:     bfin: [0] CORE FAULT core cannot read register [58]
error:     bfin: [0] CORE FAULT core cannot read register [59]
error:     bfin: [0] CORE FAULT core cannot read register [60]

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